超声沉淀法制备BiOI/TiO_(2)复合材料及性能研究  

Study on Properties of Adsorption-Photocatalytic BiOI/TiO_(2) Composites Prepared by Ultrasonic Precipitation

作　　者：邓胜连 王碧玉 龚玲涵 杨燕玲 黄成华[1] 张理元[1,2] DENG Shenglian;WANG Biyu;GONG Linghan;YANG Yanling;HUANG Chenghua;ZHANG Liyuan(College of Chemistry and Chemical Engineering,Neijiang Normal University,Neijiang 641l12,China;Key Laboratory of Fruit Waste Treatment and Resource Recycling of the Sichuan Provincial College,Neijiang 641112,China)

机构地区：[1]内江师范学院化学化工学院,四川内江641112 [2]果类废弃物资源化四川省高校重点实验室,四川内江641112

出　　处：《环境科学与技术》2022年第10期128-136,共9页Environmental Science & Technology

基　　金：四川省应用基础研究项目(2019YJ0383)。

摘　　要：文章以硫酸钛为钛源、氨水为沉淀剂、双氧水为胶溶剂,采用沉淀-胶溶法制备了TiO_(2),利用超声沉淀法制备BiOI并与TiO_(2)复合制备了吸附-光催化一体的BiOI/TiO_(2)复合材料。以罗丹明B为目标有机污染物,研究了BiOI/TiO_(2)复合材料的吸附-光催化性能。结果表明:BiOI成功与TiO_(2)复合,BiOI/TiO_(2)复合材料表现出一定的吸附能力和较高的光催化降解能力。600 W金卤灯照射25 min,27%BiOI/TiO_(2)对罗丹明B的降解率高达92.71%,相对于TiO_(2)的降解率有极大提高。BiOI复合TiO_(2)后,结晶度和晶粒尺寸变化不明显,光吸收带边发生一定的红移,促进了异质界面光生电子-空穴的有效分离,从而提高了光催化性能。TiO_(2)was prepared by the precipitation-peptization method,and titanium sulfate was used as titanium source,ammonia as precipitant and hydrogen peroxide as complexing agent.Besides,BiOI was prepared and coupled with TiO_(2)by the ultrasonic precipitation method to obtain adsorption-photocatalysis integrated BiOI/TiO_(2)composites.The adsorption and photocatalytic performances of BiOI/TiO_(2)composites were studied with Rhodamine B as the target organic pollutant.Consequently,BiOI was successfully coupled with TiO_(2),and BiOI/TiO_(2)composites showed a certain behavior of adsorption ability and an excellent photocatalytic degradation performance.When the BiOI/TiO_(2)(mass rotio of 27%)was irradiated with 600 W metal halide lamp for 25 min,its Rhodamine B degradation rate could reach up to 92.71%,a remarkable upgrade compared with that of sole TiO_(2).On the other hand,after TiO_(2)being coupled with BiOI,it was found there was no evident change of crystallinity and grain size of TiO_(2),while the light absorption band edge showed a certain red shift,which promoted the effective separation of photogenerated electrons and holes at the heterogeneous interface,so as to improve the photocatalytic performance.

关 键 词：沉淀-胶溶法 超声沉淀法 BiOI/TiO_(2)复合材料 吸附-光催化一体 

分 类 号：X131.2[环境科学与工程—环境科学] TB34[一般工业技术—材料科学与工程]